python筛选txt文件中的内容数据

import os
pth = r'C:\test'
os.chdir(pth)
file = os.path.join(pth,'test.txt')
file = open(file,'r',encoding = 'GB2312',errors = 'ignore')
trgfile = open('筛选结果.txt','a')

for line in file:
    line = line.strip()
    print(line.split()[1])
    if line.split()[1] !='4018':
#        print(line)
        continue
    trgfile.write(line)
    trgfile.write("\n")
file.close()
trgfile.close()